Unbundled Dedicated Transport Availability - Wire Center Tiers
Determining Route Specific Unbundling Requirements
In order to determine whether unbundled dedicated transport is available on a specific route, you must identify the tier levels for the end points of the desired route (the A and Z locations). A listing of wire centers and associated tier levels is provided below. Once the tier levels for the A and Z location have been identified, the following charts may be used to determine if unbundling is available on the desired route. Requests for Unbundled Dedicated Transports (DS1s or DS3s) to AT&T unimpaired wire centers will error back to the CLECs for “Product not eligible at route, request invalid”.
Determining Impairment for DS1 Interoffice TransportRoutes
DS1 level dedicated interoffice transport is available on an unbundled basis unless both of the end points of the requested route are Tier 1 wire centers (subject to volume cap).
|
A location |
Z location |
DS1 UDT available? |
|
Tier 1 |
Tier 1 |
No |
|
Tier 1 |
Tier 2 |
Yes* |
|
Tier 1 |
Tier 3 |
Yes* |
|
Tier 2 |
Tier 1 |
Yes* |
|
Tier 2 |
Tier 2 |
Yes* |
|
Tier 2 |
Tier 3 |
Yes* |
|
Tier 3 |
Tier 1 |
Yes* |
|
Tier 3 |
Tier 2 |
Yes* |
|
Tier 3 |
Tier 3 |
Yes* |
*Subject to DS1 Transport Volume Caps
Determining Impairment for DS3 Interoffice Transport Routes
DS3 level dedicated interoffice transport is available on an unbundled basis unless the end points of the requested route are Tier 1 or Tier 2 wire centers. If either end point is a Tier 3 wire center, unbundling is available (subject to volume cap).
|
A location |
Z location |
DS3 UDT available? |
|
Tier 1 |
Tier 1 |
No |
|
Tier 1 |
Tier 2 |
No |
|
Tier 1 |
Tier 3 |
Yes* |
|
Tier 2 |
Tier 1 |
No |
|
Tier 2 |
Tier 2 |
No |
|
Tier 2 |
Tier 3 |
Yes* |
|
Tier 3 |
Tier 1 |
Yes* |
|
Tier 3 |
Tier 2 |
Yes* |
|
Tier 3 |
Tier 3 |
Yes* |
*Subject to DS3 Transport Volume Caps
Determining Impairment for Dark Fiber Interoffice Transport Routes
Dark Fiber dedicated interoffice transport is available on an unbundled basis unless the end points of the requested route are Tier 1 or Tier 2 wire centers. If either end point is a Tier 3 wire center, unbundling is available.
|
A location |
Z location |
Dark Fiber UDT available? |
|
Tier 1 |
Tier 1 |
No |
|
Tier 1 |
Tier 2 |
No |
|
Tier 1 |
Tier 3 |
Yes* |
|
Tier 2 |
Tier 1 |
No |
|
Tier 2 |
Tier 2 |
No |
|
Tier 2 |
Tier 3 |
Yes* |
|
Tier 3 |
Tier 1 |
Yes* |
|
Tier 3 |
Tier 2 |
Yes* |
|
Tier 3 |
Tier 3 |
Yes* |
See Tables Below
| Midwest | top | ||
|---|---|---|---|
| Revised: 08/08/12 |
|
Midwest Region Wire Center Tiers | |
| Southwest | top | ||
|---|---|---|---|
| Revised: 08/08/12 |
|
Southwest Region Wire Center Tiers | |
| West | top | ||
|---|---|---|---|
| Revised: 08/24/09 |
|
West Region Wire Center Tiers | |
| Wire Centers with Competitive Fiber within a Half Mile | top | ||
|---|---|---|---|
|
Wire Centers with Competitive Fiber within a Half Mile | ||
